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CVE-2025-6436

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CVSS 3.1
8.1 high
EPSS
3%p88
Published
()
Modified
Description

Memory safety bugs present in Firefox 139 and Thunderbird 139. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 140 and Thunderbird 140.

Vendors
mozilla
Products
firefox, thunderbird
Weakness
CWE-119
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD CVE.org GitHub PoCs EPSS (3.3%)

In the news

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